ISHS Acta Horticulturae 396: Hydroponics and Transplant Production
INFLUENCE OF TEMPERATURE AND SOIL WATER CAPACITY ON THE EMERGENCE OF CUCUMIS SATIVUS L. SEEDS |
| Author: | M. Kretschmer |
| Keywords: | Cucumis sativus, Seed emergence, Soil water content, Temperature |
| Abstract:
Cucumis sativus seeds of 'Delikatess' were sown in a loamy sand 2 cm deep. The experiments were carried out in climatised chambers with fluorescent tubes at different temperatures (15, 20, 25, 30°C) and water capacities from 30 to 80% with steps of 10%. Additionally, the soil moisture tensions from pF 3.5 to 2.2 were determined corresponding to the water capacities. High emergence results (86–93%) were found at 30°C and at all water capacities and also at 25°C and at water capacities from 40 and 50%. The temperature of 20°C diminished the emergence from 79 to 20% at increasing water capacity. 15°C were beyond the upper limit of the optimal temperature range. The factor water capacity influenced the emergence of seeds with 87%. The shortest mean emergence time (3–4 days) was found at 25°C and at water capacities from 60 to 80% and also at 30°C and at water capacities from 50 to 80%. The shortest final emergence time (6 days) was investigated at 30°C and water capacities from 60 to 80%. Therefore, under such temperature conditions, a quick and consequently a uniform emergence, for example for the production of transplants, is possible to achieve. | |
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